OP is talking about the controversial original iMac launch in 1998:
http://www.macworld.com/article/1133334/original_imac.html
"Considering all these amenities, the most shocking part of the iMac isn’t what it offers, but what it lacks. The iMac has no floppy drive, which might be forgivable if there were a Zip drive or other removable-media option, but there isn’t.
And most dramatically, this new consumer offering has no SCSI port, no standard serial ports, and no ADB ports. Apple has opted to replace these familiar connections with USB, a high-speed serial architecture that has suffered from slow adoption on the Wintel platform despite its technical advantages (see the sidebar “USB: Ready for Prime Time?”). Currently, no USB devices exist for the Mac."